Is it possible for my hubby to know whether i am a virgin or not?
No, not physically
There is a wide range of normal anatomy, so you cannot be certain about virginity based only on physical exam. Mentally and psychologically, however, it can be hard to keep hidden, especially with people we care deeply for. If it is at all possible, I would encourage you to talk with him and be open.
Marriage is largely about forgiving and being willing to be forgiven. Much love grows out of this.